package com.imooc.controller;

import com.imooc.enums.ResultEnum;
import com.imooc.exception.SellException;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.exception.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.net.URLEncoder;

/**
 *               MP在微信里面是公众账号的意思
 */
@Controller    //这里的方法要跳转，所以不能用restcontroller，因为它是返回的JSON格式，那还怎么跳转呢
@RequestMapping("/wechat")
@Slf4j
public class WechatController {

//    http://sell-from-jll.natapp1.cc/wechat/authorize?returnUrl=http://www.imooc.com

    @Autowired
    private WxMpService wxMpService;

    @GetMapping("/authorize")
    public String authorize(@RequestParam("returnUrl") String returnUrl) {
        //1. 配置   这里肯定是注入
        //2. 调用方法
        //这种地址肯定是要放到配置文件里
        String url = "http://sell-from-jll.natapp1.cc/sell/wechat/userInfo";
        //这里是重定向到另外一个方法、返回一个重定向的URL
        String redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url,
                WxConsts.OAUTH2_SCOPE_USER_INFO, URLEncoder.encode(returnUrl));  //
        return "redirect:" + redirectUrl;
    }

    @GetMapping("/userInfo")
    public String userInfo(@RequestParam("code") String code,
                           @RequestParam("state") String returnUrl) {
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken = new WxMpOAuth2AccessToken();
        try {
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        } catch (WxErrorException e) {
            log.error("【微信网页授权】{}", e);
            throw new SellException(ResultEnum.WECHAT_MP_ERROR.getCode(), e.getError().getErrorMsg());
        }

        String openId = wxMpOAuth2AccessToken.getOpenId();

        return "redirect:" + returnUrl + "?openid=" + openId;
    }

}
